Access win32 css as resource, not custom generated C code

[~andy/gtk] / gtk / gtk.gresource.xml

<?xml version="1.0" encoding="UTF-8"?>
<gresources>
  <gresource prefix="/org/gtk/libgtk">
    <file>gtk-default.css</file>
    <file>gtk-win32.css</file>
  </gresource>
</gresources>